How to Charge Eufy Door Lock Battery

This guide walks you through how to charge your Eufy door lock battery the right way. You’ll learn when, how, and why proper charging keeps your smart lock running smoothly and extends battery life.

Key Takeaways

• Use only the official Eufy charging cable and adapter: Third-party chargers may damage the battery or void your warranty.
• Charge when the battery drops below 20%: Waiting too long can cause the lock to shut down unexpectedly.
• Remove the battery pack before charging: This ensures safe and effective charging without risking damage to the lock mechanism.
• Allow 4–6 hours for a full charge: Rushing the process with fast chargers can reduce long-term battery health.
• Store spare batteries properly: Keep them in a cool, dry place and avoid metal contact to prevent short circuits.
• Monitor battery health via the Eufy app: Regular checks help you stay ahead of low-power situations.
• Replace batteries every 6–12 months: Even rechargeable batteries degrade over time and need replacement.

How to Charge Eufy Door Lock Battery: A Complete Step-by-Step Guide

Smart door locks like those from Eufy offer convenience, security, and peace of mind. But like any electronic device, they rely on power—and when that power runs low, you need to know exactly how to recharge it. If you’ve ever been locked out because your Eufy door lock battery died, you’re not alone. The good news? Charging your Eufy door lock battery is simple, safe, and straightforward—when you follow the right steps.

In this guide, we’ll walk you through everything you need to know about charging your Eufy door lock battery. Whether you’re using a Eufy Smart Lock Touch, Eufy Security Entry, or another model, the process is similar. You’ll learn how to safely remove the battery, charge it properly, reinsert it, and maintain long-term battery health. We’ll also cover troubleshooting tips, best practices, and how to avoid common mistakes.

By the end of this guide, you’ll feel confident handling your Eufy lock’s power needs—so you’ll never be stuck outside your own home again.

Why Charging Your Eufy Door Lock Battery Matters

Your Eufy door lock is a critical part of your home security system. It keeps intruders out, lets you unlock your door with a fingerprint or phone, and sends alerts when someone comes and goes. But all of that depends on one thing: power.

The Eufy door lock uses a rechargeable lithium-ion battery pack to operate. Unlike traditional locks that use disposable AA batteries, Eufy’s rechargeable system is more eco-friendly and cost-effective over time. However, it also means you need to be proactive about charging.

If the battery dies completely, your lock may stop responding to fingerprints, keypads, or app commands. In some cases, you might even lose access to your home—unless you have a physical key or backup entry method. That’s why knowing how to charge your Eufy door lock battery is essential.

Regular charging also helps extend the life of your battery. Lithium-ion batteries degrade over time, especially if they’re frequently drained to 0% or charged with incompatible equipment. By following proper charging habits, you can keep your lock running smoothly for years.

What You’ll Need to Charge Your Eufy Door Lock Battery

Before you begin, make sure you have the right tools and equipment. Using the wrong charger or skipping steps can damage your battery or lock.

Here’s what you’ll need:

• Official Eufy charging cable and adapter: This is the safest and most reliable option. Eufy includes a USB-C or micro-USB cable (depending on your model) and a compatible wall adapter. Avoid third-party chargers, as they may deliver incorrect voltage or current.
• A power source: A standard wall outlet or a USB port on a computer or power bank.
• A clean, dry workspace: Choose a flat, stable surface near an outlet. Avoid charging near water or in humid areas.
• Your Eufy app (optional but helpful): The app shows battery percentage and charging status, so you can monitor progress remotely.
• A spare battery (if available): If you have a backup battery, you can swap it in while the main one charges—so your lock stays powered.

Having these items ready will make the charging process quick and hassle-free.

Step 1: Check Your Battery Level

Before you start charging, it’s important to know how much power your battery has left. Charging too early is unnecessary, but waiting too long can leave you stranded.

How to Check Battery Level in the Eufy App

The easiest way to check your battery level is through the Eufy Security app. Here’s how:

1. Open the Eufy Security app on your smartphone.
2. Tap on your door lock device from the home screen.
3. Look for the battery icon or percentage in the device details.
4. If the battery is below 20%, it’s time to charge.

The app may also send you a low-battery notification when the charge drops to 15% or 10%. These alerts are helpful, but don’t rely on them alone—check manually every few weeks.

Alternative: Check via the Lock Itself

If you don’t have your phone handy, you can also check the battery level directly on the lock:

• Press any button on the keypad.
• If the screen lights up normally, the battery is likely above 20%.
• If the screen is dim, flickers, or doesn’t respond, the battery is low.
• Some models show a battery icon on the display when power is low.

Keep in mind that visual cues aren’t as accurate as the app. For best results, use the Eufy app to monitor battery health regularly.

Step 2: Remove the Battery Pack

Once you’ve confirmed the battery is low, it’s time to remove it from the lock. This step is crucial—charging the battery while it’s still in the lock can cause overheating or damage.

Locate the Battery Compartment

The battery pack is usually located on the interior side of the door lock. Look for a small panel or cover near the bottom of the lock housing. On most Eufy models, this panel is held in place by a small screw or a sliding latch.

Open the Battery Cover

1. Use a Phillips-head screwdriver to remove the screw (if applicable).
2. Gently slide or lift the cover to expose the battery pack.
3. Be careful not to force it—some covers are designed to pop open with slight pressure.

Disconnect and Remove the Battery

1. You’ll see a rechargeable battery pack connected by a small cable.
2. Gently unplug the connector by pulling it straight out—do not yank or twist.
3. Lift the battery pack out of the compartment.
4. Set it aside on a clean, dry surface.

Tip: Take a photo of the battery orientation before removing it. This makes reinsertion easier and prevents mistakes.

Step 3: Connect the Charging Cable

Now that the battery is out, it’s time to plug it in.

Use the Official Eufy Charging Cable

Always use the cable that came with your Eufy lock. This ensures the correct voltage and current are delivered. Using a third-party cable—even if it fits—can damage the battery or reduce its lifespan.

Plug In the Cable

1. Locate the charging port on the battery pack. It’s usually a USB-C or micro-USB port.
2. Insert the charging cable firmly into the port. You should feel a slight click.
3. Connect the other end to the wall adapter or USB power source.
4. Plug the adapter into a wall outlet.

Check for Charging Indicators

Most Eufy battery packs have a small LED light that shows charging status:

• Red light: Battery is charging.
• Green or blue light: Battery is fully charged.
• No light: Check connections—the cable may not be plugged in properly.

If the light doesn’t turn on, double-check the cable connections and try a different outlet.

Step 4: Charge the Battery Fully

Charging time depends on the battery capacity and how low it was when you started.

How Long Does It Take?

On average, it takes 4 to 6 hours to fully charge a depleted Eufy door lock battery. Avoid using fast chargers or high-power adapters, as they can overheat the battery and shorten its lifespan.

Monitor Charging Progress

While the battery charges, you can:

• Check the LED light periodically.
• Use the Eufy app to monitor battery percentage (if your model supports it).
• Set a timer to remind yourself when charging is complete.

Tip: Don’t leave the battery charging overnight unattended. While modern lithium-ion batteries have safety circuits, it’s best to unplug once fully charged.

What If the Battery Won’t Charge?

If the LED light doesn’t turn on or the battery doesn’t gain charge after an hour:

• Try a different USB cable or power source.
• Clean the charging port with a dry cloth—dust or debris can block connection.
• Test the battery in another Eufy device (if available).
• Contact Eufy support—the battery may be defective.

Step 5: Reinsert the Battery Pack

Once the battery is fully charged, it’s time to put it back in the lock.

Reconnect the Battery

1. Plug the battery connector back into the port inside the lock. Make sure it’s seated firmly.
2. Place the battery pack into the compartment, aligning it correctly.
3. Replace the cover and secure it with the screw (if applicable).

Test the Lock

After reinserting the battery:

• Press a button on the keypad to wake up the lock.
• Try unlocking with your fingerprint, code, or app.
• Check the battery percentage in the Eufy app to confirm it’s recognized.

If the lock doesn’t respond, double-check the battery connection and ensure the cover is fully closed.

Step 6: Maintain Battery Health Over Time

Charging your Eufy door lock battery isn’t a one-time task—it’s an ongoing process. To keep your lock running smoothly, follow these maintenance tips:

Charge Before It Dies

Aim to charge your battery when it reaches 20–30%. Letting it drop to 0% regularly can degrade the battery faster.

Avoid Extreme Temperatures

Don’t charge or store the battery in very hot or cold environments. Ideal temperature range is 32°F to 104°F (0°C to 40°C).

Use the Lock Regularly

Lithium-ion batteries perform best when used frequently. If you’re away for long periods, check the battery level remotely via the app.

Keep the Charging Port Clean

Dust and debris can interfere with charging. Wipe the port gently with a dry cloth every few months.

Replace When Needed

Even rechargeable batteries wear out. If you notice the battery drains quickly or won’t hold a charge, it’s time for a replacement. Eufy sells official replacement batteries compatible with most models.

Troubleshooting Common Charging Issues

Even with proper care, you might run into problems. Here’s how to fix the most common issues:

Battery Won’t Charge

• Check the cable and adapter—try a different one.
• Ensure the outlet is working (test with another device).
• Inspect the battery port for damage or dirt.
• Reset the lock by removing and reinserting the battery.

Lock Doesn’t Recognize the Battery

• Make sure the connector is fully plugged in.
• Try charging the battery for at least 30 minutes before reinserting.
• Update the Eufy app and lock firmware.

Battery Drains Too Fast

• Check for firmware updates—bugs can cause power drain.
• Reduce usage of power-heavy features like Wi-Fi or constant notifications.
• Ensure the lock isn’t stuck in a “waking” state due to a faulty sensor.

LED Light Flashes or Stays Off

• A flashing light may indicate a charging error—unplug and retry.
• If the light stays off, the battery may be damaged or incompatible.
• Contact Eufy support for warranty assistance.

Best Practices for Long-Term Battery Life

To get the most out of your Eufy door lock battery, follow these best practices:

• Charge regularly: Don’t wait until the battery is critically low.
• Use official accessories: Stick to Eufy-branded cables and adapters.
• Avoid overcharging: Unplug once the battery is full.
• Store spares properly: Keep backup batteries in a cool, dry place.
• Update firmware: New updates often improve power efficiency.

By following these tips, you’ll extend the life of your battery and reduce the risk of unexpected lockouts.

Conclusion

Charging your Eufy door lock battery is a simple but essential task that keeps your smart home secure and functional. By checking the battery level regularly, using the right equipment, and following the correct steps, you can ensure your lock stays powered and reliable.

Remember: always use the official charging cable, remove the battery before charging, and monitor progress via the Eufy app. With proper care, your Eufy door lock will serve you well for years to come.

Don’t wait until you’re locked out—make charging part of your regular home maintenance routine. Your future self will thank you.